"On Free SkypeOut Days you'll be able to redeem 10 minutes of credit for
SkypeOut calls and it won't cost you a thing."
"How do I know when it's a Free SkypeOut Day?
We wish every day could be a Free SkypeOut Day, but that would make us
bankrupt. So our accountant says we can have 4 of them this month."
More at
http://www.skype.com/campaigns/freeskypedays/
Regards
Sunil
Free SkypeOut calls... 
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